Lambert Academic Publishing is a brand of OmniScriptum S.R.L. Isuggest investigatingmixed systems (sequential and non-sequential). Please try again in a few minutes. Enter your username or e-mail address. I've made my array fine and I'm using a diffractive source. There are more array types available in this forum post: Another simple option is to use multi configuration, with one configuration per lens. The definition of Corningbfor the numerical aperture is the sin of the half angle to 1% of the peak center intensity. March 31, 2021 00:55 OpticStudio allows all sources to be replicated as arrays. Mostly, the lens shape is cylindrical or spherical. Current research also relies on microlens of various types to act as concentrators for high efficiency photovoltaic for electricity production. PowerPhotonic offers a wide range of standard and custom microlens arrays, with high uniformity of RoC, conic constant and pitch. Then the parameters have been optimized by using ZEMAX and the microlens arrays with different substrate thicknesses have been compared. Are you somehow trying to incorporate an MLA into a UDA (which I dont think is doable)? Neither SPIE nor the owners and publishers of the content make, and they explicitly disclaim, any express or implied representations or warranties of any kind, including, without limitation, representations and warranties as to the functionality of the translation feature or the accuracy or completeness of the translations. So you could set them up for a specific lenslet and that would then trace a chief ray for a specific lenslet. Poly. To access this item, please sign in to your personal account. Sorry, we're still checking this file's contents to make sure it's safe to download. Single microlens is used to couple light to optical fibers while microlens arrays are often used to increase the light collection efficiency of charge-coupled device (CCD) array. It is used to spatially transform light from a nonuniform distribution to a uniform irradiance distribution at the image plane. My question is, how valid is the Image Analysis for such a setup? The question is, what should be used as Reference (Chief Ray or Vertex) to analyse the beam decenter. Additionally, Im guessing some kind of post-processing of the image is necessary to actually make the image resolvable? 2. i am not sure if hier is the right place for my topic, but i take my chances. US_Array modelsan n x m array of lenses, but the number of lenses in each direction must be odd. Just to be clear here, so that I am sure that I understand your question correctly: are you asking about the proper Reference setting (either Chief Ray or Vertex) for your MLA decenter? Microlens arrays are the key component in imaging systems because the systems exhibit some excellent optical properties such as large FOV angles and low aberration and distortion 6 . Has anyone ever tried to use Zemax to model these effects before or is there an examplesomewhere? Fill-factor area occupied by the microlens arrays. Thank you Ronian for your insight on this. Please refer to the following Knowledgebase article for details on how to compile a DLL:How to compile a User-Defined DLL Knowledgebase (zemax.com). Sorry, we're still checking this file's contents to make sure it's safe to download. Sorry, we're still checking this file's contents to make sure it's safe to download. Please try again in a few minutes. INTROUCTION Microlens arrays have been applied in many electro-optical and micro-optical systems, such as flexible light-field smart-phones1, solar concentrators2, data storage3 and Integral Imaging 3D displays 4, etc. (Note that to be useful all of the lenses would need to be a single surface, otherwise different rays could not strike different lenses first.). These two factors cause the low detection sensitivity of CMOS. Yes let us know how this goes and we'll be happy to help. ZEMAX 1. Proceedings Volume 12061, AOPC 2021: Infrared Device and Infrared Technology; Tolerancing a radial velocity spectrometer within Zemax, New approach to optical assembly and cementing. It's hard to say for sure without being able to look at your file, but is Surface 24 meant to be an evaluation plane rather than an optical surface? C. Christos.Katopodis. They arefound in the folderZemax\DLL\Surfaces. The microlens array beam homogenizer usually contains two lens arrays and a condenser lens, which will have much greater at-top uniformity. 1 reply 174 views Raphael.S Single Emitter 0 replies Hello community, i want to simulate a aspherical surface with aspheric coefficients (2,4,6,8,10,12,14,16,) as a microlens array. A fly's eye array is a two-dimensional array of individual optical elements assembled into a single optical element. We developed a single microlens model of Kodak KAI- 16,000 image detector based on Fig. Enter your username or e-mail address. Using this program, sequential or non-sequential optical systems can be designed and optical performance analysis of these systems can be made [ 18 ]. Using the spot size (airy disc) or MTF doesnt seem to work with arrays. 120 High Road, East FinchleyLondon, N2 9EDUnited KingdomStr. Lenslet arrays are modeled using the user defined surface. The initial parameters of the microlens array have been calculated according to the structure of a CMOS. The manufacturers' data is as follows. The sequential DLL is quite easy to modify (non sequential are more complex). ~ Ronian. Best answer by David 1 September 2021, 18:55. Features Polymethyl Methacrylate (PMMA) Substrate 10.0 mm x 9.8 mm High-Quality Microlens Array Available Unmounted or in a 1" Mount Offered Uncoated or Broadband AR Coated We'll send you an e-mail with instructions to reset your password. Enter your username or e-mail address. I created 2 configs: a nominal and a decentered one. The entrance and exit ports are drawn. Array size strongly depends on the applications. Fill-factor area occupied by the microlens arrays. ZEMAX. Since they are from a single field, optimization will try to form one spot, which it will be unable to do. As Ray mentioned, there are sequential array lens types which comewith your installation of OpticStudio. The initial parameters of the microlens array have been calculated according to the structure of a CMOS. If you want to trace a chief ray for a specific lenslet, you can use vignetting factors. Microlens arrays are also used in some digital projectors, to focus light to the active areas of the LCD used to generate the image to be projected. For instance, in the below image, I have two configurations for a cylindrical lens, Config 1 (in blue rays) being the nominal placement, and Config 2 (in green rays) being a displaced len along the Y-axis: Since the decenter is defined to only apply to the lens, the image surface is left unaffected. I created a dummy version of my design to upload hier. Astrophysical Observatory. Then you can select a DLL such as US_ARRAY,US_ARRAYEVEN. In mixed mode, a Nonsequential Component is inserted as a surface in the sequential lens data editor. Array size strongly depends on the applications. 93 views. Zemax Staff 711 replies 2 years ago The example from the KBA How to use POP with lenslet arrays is using a lenslet array. In non-sequential mode, the easiest would be to define the parent lens and replicate it using boleans operations and the array object. The sample source code and DLL are provided as US_ARRAY.C and US_ARRAY.DLL, respectively. When incident light successively passes through microlens array and the distance, obtaining the minimum facula is around 0.347 um in the active area. If you can, feel free to share it on this thread here. 3) DOF = 2 (EFL t) 2 s 2 N C (E F L t) 4 s 2 N 2 c 2, (3) where N is the aperture number of the lens and c is the diameter of the circle of confusion. The issue is that in one case the chief ray can't be traced: So that means that the reference is the same in both configs. Heres a good article that describes the details: How to use POP with lenslet arrays. Both . (I used the user defined .dll for building the MLA) OpticStudio. Microlens Arrays Solar Concentrator Design using ZEMAX, https://www.instagram.com/omniscriptum.publishing. Both types use either cross-cylindrical or square microlens arrays to divide the incident beam into beamlets. The incident beam cross-section is split into an array of beams by a sub-microlens array. Hi Everyone! To analyse sensitivity of the decenter missalignment of a cylinderical MLA, which is useed to generate a uniform line, i use the Geometric Image Analysis as in attachment. Setting the Reference to Vertex then shows the displacement of the focused beam in a way that matches up with what we see in the 3D Viewer: If this doesn't answer your question, though, we may be able to provide more help if we can take a look at your file. Such an array can be created in non-sequential mode using the Ring Array object. We haven't found any reviews in the usual places. By using ZEMAX software, the size and position changes of the imaging light spot of the micro-lens array in the case of incident at different field of view angles are compared and analyzed, and the structural parameters are optimized. I know this method. Multi-channel optical communication systems require microlens arrays for coupling between laser sources, fiber and waveguide arrays, optical . This could then be used in mixed mode. 1 reply Dear Community, I'm trying to model the diffraction from microlens arrays using non-sequential mode. Setting up the initial design This article describes a commercial fiber coupler, which couples two pieces of Corning SMF-28e Fiber using SUSS MicroOptics FC-Q-250 microlens arrays. You will have access to both the presentation and article (if available). Hello Everybody, These microlens arrays are typically composed of microlens cells arranged in a deterministic pattern5. Use, Smithsonian I used both coordinate brake and decenter in non-seq-editor to move the MLA about half pitch size prependicular to beam propagation. i want to simulate a aspherical surface with aspheric coefficients (2,4,6,8,10,12,14,16,) as a microlens array. With optical sensor arrays tiny lens systems serve to focus and concentrate the light onto the photodiode surface instead of allowing it to . 0 replies. Hayfa Rashid. Open the file {Zemax}\Samples\Physical Optics\Lenslet Array.zmx. This functionality is provided solely for your convenience and is in no way intended to replace human translation. It can range from 12 for optical switch applications up to more than 103103 for diffusers or display applications. All lens parameters can be customer-specified: spherical, aspherical, astigmatic or acylindrical lenses can be arranged on a linear, square, hexagonal or arbitrary grid. In order to reduce the optical crosstalk and improve the fill factor of CMOS image sensor, a microlens array has been designed and integrated with CMOS. Sorry, our virus scanner detected that this file isn't safe to download. Its not clear that use of the Source Diffractive object in a nonsequential model is the proper way to go about looking at diffraction from a microlens array (MLA). Microlens arrays contain multiple lenses formed in a one-dimensional or two-dimensional array on a supporting substrate. Is there a way to find the resolution of a system that uses a microlens array (MLA) for imaging in sequential mode? Both beamlets . Hongyan Xu, Defeng Mo, Yingjie Ma, Zhenli Zhao, Xiangyang Liu, Tong Zhao, Xue Li, "Focused micro-lens array design and performance testing," Proc. The ADS is operated by the Smithsonian Astrophysical Observatory under NASA Cooperative Figure 1 illustrates the schematic of the optical CMA homogenizer constructed in ZEMAX software. Hi @Maximizator- The solution Ray shared is part of the Code Exchange. Otherwise, you are welcome to open a support case on MyZemax at this link. You could modify the C code of the DLL to create a new lenslet array that meets your specifications (You can find the code in the DLL\Surfaces folder). It would be interesting to see how this works out. This type of surface is entirely arbitrary and is defined via an external DLL. In this case, let's say you have an array of 100 lenslets (i.e., you have a 10 x 10 array). Good luck! It is defined with a user-defined surface us_array.c. In sequential mode, I would suggest the sample .dll that is included in OpticStudio. So in this example, there is a pupil for the whole system so it won't trace a chief ray for a specific lenslet. However, I dont know of any supplied DLLs for producing such an array in pure sequential mode. Microlens arrays are also used in some digital projectors, to focus light to the active areas of the LCD used to generate the image to be projected. The microlens array can be formed the curvature compound eye microlens array because of the negative pressure resulted in the hemisphere. Help me please to model the lens array in sequential mode. Lenslet arrays are modeled using the user defined surface. Ive made my array fine and Im using a diffractive source. Here is a dummy example for you. There are more array types available in this forum post: The lenses each focus the rays that strike them. Best answer by David.Nguyen 19 December 2022, 17:25. thanks for your quick reply. I can sort out your account details on the forum if needed. Enter your username or e-mail address. The optical crosstalk between the pixel units can influence the image quality of CMOS image sensor. The array types include rectangular grid, hexapolar array and more. A curvature with microlens array for the bionic compound eye can be fabricated. In sequential mode, I would suggest the sample .dll that is included in OpticStudio. The array is modeled on surface 2 which is defined using a User-Defined type surface. The lenses have a rectangular shape and the aspheric terms are only in one axis. In line with the findings obtained, it was determined that the designed anti-reflective microlens arrays for space application provided a total increase of 5.9% in the amount of the current generated from solar cells and . Don't know why. Each configuration would specify an x and y decenter for a single lenslet. The ZEMAX software can be used to simulate the light path with a long focal length for the compound eye. only 125m decenter of MLA causes about 16mm profile shift if i use the Chief Ray as Reference. For 2) homogenization, please see this knowledgebase article about how to model microlens arrays in non-sequential mode:Flys eye arrays for uniform illumination in digital projector optics Knowledgebase (zemax.com). 1 Fabrication Methods for Microlenses 2 Applications 3 Our Experience 4 Microlens Arrays 5 Our Experience A microlens is roughly defined as a lens with a diameter lower than 1 mm to around 10 micrometers. Just to be clear: GIA with reference to Chief Ray has too much shift in compare to GIA with refrence to vertex. It is defined with a user-defined surface us_array.c. Zemax, LLC thanks Dr. Reinhard Voelkel of Suss MicroOptics SA for the experimental data used in this article. Facile and flexible fabrication of gapless microlens arrays using a Two-dimensional electrophoretic microlens alignment, First results from the UBC etch-alignment mosaic CCD, Parameters selections in confocal technology. Enter your username or e-mail address. Are both settings not quite giving you what you expect? Sorry, our virus scanner detected that this file isn't safe to download. If you want an even number, you have a few options: 1. Im trying to model lens array imaging using mixed mode (array defined in NSC). Best answer by Ray 19 October 2021, 09:12. Collimation and coupling of fibers can be made simple with the use of a PowerPhotonic fiber array. The six lenses form six spots on the image plane. Start with an Ext. You have requested a machine translation of selected content from our databases. They are used in a way that each lenslet forms its own image. Mostly, the lens shape is cylindrical or spherical. Maybe it works better if you have an imaging lens (say, a Cooke triplet or double Gauss) in front of the lenslet array, and the chief ray is aimed towards the real entrance pupil of the imaging lens. Holographix designs and produces cost-effective, high quality custom microlens arrays to demanding customer specifications. The depth-sensing system illustrated in Figure 2 was designed to acquire the depth information of objects. The attached file implements such a system. Agreement NNX16AC86A, 8th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Design, Manufacturing, and Testing of Micro- and Nano-Optical Devices and Systems; and Smart Structures and Materials, Is ADS down? The common applications are to 1) increase the collection efficiency of pixelated detectors by providing each pixel with a lenslet aligned so as to couple light into it; 2) perform source homogenization by overlapping sections of a source. And the anti-crosstalk distance between microlens array and CMOS is 0 m 162 m. Thank you very much for the answer - that article youve linked looks to have contrasts far more like what Id expect, so Ill try it this way. It can range from 12 for optical switch applications up to more than 103103 for diffusers or display applications. Im trying to model the diffraction from microlens arrays using non-sequential mode. I mean some lens (no microlens) in the same plane on the circle radius. I noticed that when you set your Reference to Vertex, the beam itself looks well-centered on Surface 24. With optical sensor arrays tiny lens systems serve to focus and concentrate the light onto the photodiode surface instead of allowing it to fall on non-photosensitive areas of the pixel device. Sorry, we're still checking this file's contents to make sure it's safe to download. Please try again in a few minutes. See the User Defined surface documentation for details. A negative microlens array film was placed between the sensor and a fixed focal lens, with the negative microlens array units forming . This would more or less model a more realistic situation where you have a camera lens and a lenslet array at the image plane. We also provide the source code for theUS_ARRAY and US_ARRAYEVENso you can modify it as needed in order to represent whichever surface type you need. Please try again in a few minutes. Ray will not be able to share the code from that space in a public forum. I think there is the lens array as the sequential element. The incident beam cross-section is split into an array of beams by a sub-microlens array. Here is an illustration made by modifying your file: View original 1 Attachment TestFile.zip System Analysis If I build a micro lens array at sequential mode. In thinking out loud, I am imagining that Zhenfeng Zhuang is referring to a situation where you're creating a lenslet array in sequential mode using multi-configurations and coordinate breaks. Please try again in a few minutes. Thanks for your post here! Find over 2,5 million titles in our affiliate shop, in various languages, genres and countless topics. We manufacture a wide range of arrays, from basic spherical to more complex diffractive and aspheric profiles. Current research also relies on microlens of various types to act as concentrators for high efficiency photovoltaic for electricity production, Ali AL-Hamdani This space is restricted to users who have an active, supported Zemax license. There are two main types of Microlens Beam Homogenizers: (A) the Non-Imaging and (B) the Imaging Microlens Homogenizer. Here is an illustration made by modifying your file: You may find more information and sample files about the two common applications of microlens arrays that David mentioned here: For 1) to increase the collection of pixelated detectors, please see the Lenslet Arraysample file in the \Documents\Zemax\Samples\Physical Optics folder. Basically, the ray trace determines which segment of the array is struck, then uses the local lens curvature to determine the refraction. I mean some lens (no microlens) in the same plane on the circle radius. Student. Flys eye arrays for uniform illumination in digital projector optics Knowledgebase (zemax.com). 2015-11-03 Our entire Zemax Catalog is also available. However, I think I've done this before and found that OpticStudio sort of 'breaks down' for large angles. The microlens array beam homogenizer usually contains two lens arrays and a condenser lens, which will have much greater flat-top uniformity. In this study, a design for developing an anti-reflective microlens array is presented to increase the performance of multi-junction solar cells for satellite power systems. Notice, Smithsonian Terms of The optical design program Zemaxa defines the numerical aperture of a single mode optical fiber as "the sin of the half angle to the 1/e2intensity" (= 13.5%). There is an excellent article on thishere. The lenses have a rectangular shape and the aspheric terms are only in one axis. Sorry, our virus scanner detected that this file isn't safe to download. If you do have a supported license, send me a private message. In order to reduce the optical crosstalk and improve the fill factor of CMOS image sensor, a microlens array has been designed and integrated with CMOS. Fill-factor area occupied by the microlens arrays. Do you know which is the best solution for building such an lens array for aspheric surfaces? The simulation of this source includes scalar diffractive effects due the clipping of the wavefront by the aperture.. (Those available produce rectangular arrays.) Sorry, we're still checking this file's contents to make sure it's safe to download. Lens object (in this case with 2 coefficients: y^2 and y^4 only but it can go up to y^16): Then, use the Array object to make the lenslet array: Finally, convert the system into a mixed sequential/non-sequential one: Im attaching this example for your reference.
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